We have the same problem with our zapier to retrive leads from Facebook , the start of problem was 

yesterday all zapier work fine .

Same issue

Same error guys, im going to contact the support.

Same here

Hi, I have the same issue, any solution so far? 

Thanks in advance!

The same, after https://status.zapier.com/incidents/2zk7bgjlc3ny# i have 

Error code: Error while retrieving: The app returned "A test lead was already created for this leadgen form. Delete the existing lead before creating a new one. To retrieve the lead id, use the GET call on /test_leads edge.".

Same issue here!

Hi there @Basti, @Dominosrl, @HarisP, @Adrian Latorre, @sztimi, @Mark1985, @simone_murtas, @KevvinS5 and @Funnel Consulting!

I’m so sorry we didn’t come across your messages here sooner. The errors you’re seeing are related to the ongoing incident that’s been being discussed over here:

I’ve ensured that you’ve all been added to the bug report that’s associated with the incident so you’ll get an email notification as soon as it’s resolved. For now, please subscribe to updates from the incident status page here: https://zapier.statuspage.io/incidents/nfbj175s97md

Since there's already an open thread discussing this incident, I’ll close this one to keep all discussions in one place for easier tracking. Thanks for your patience!